<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%
    if(session.getAttribute("username")==null){
    	out.print("你还没有登录,3秒钟之后重新登录");
     	response.setHeader("refresh","3;url='example2_2_2.jsp'") ; 
    }
    else{    
%>
	欢迎<%=(String)session.getAttribute("username") %>
	<br/>
	=====example2_2_2b.jsp页面内容=====<br/>
	<a href="example2_2_2c.jsp">注销</a>
<%} %>


